This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 3 |
| 2 | 4 |
| 3 | 30 |
| 4 | 31 |
| 5 | 39 |
| 6 | 40 |
| 7 | 273 |
| 8 | 274 |
| 9 | 282 |
| 10 | 283 |
| 11 | 354 |
| 12 | 355 |
| 13 | 363 |
| 14 | 364 |
| 15 | 2460 |
| 16 | 2461 |
| 17 | 2469 |
| 18 | 2470 |
| 19 | 2541 |
| 20 | 2542 |
| 21 | 2550 |
| 22 | 2551 |
| 23 | 3189 |
| 24 | 3190 |
| 25 | 3198 |
| 26 | 3199 |
| 27 | 3270 |
| 28 | 3271 |
| 29 | 3279 |
| 30 | 3280 |
| 31 | 22143 |
| 32 | 22144 |
| 33 | 22152 |
| 34 | 22153 |
| 35 | 22224 |
| 36 | 22225 |
| 37 | 22233 |
| 38 | 22234 |
| 39 | 22872 |
| 40 | 22873 |